Strasburg (back) was on the disabled list and the Nationals waited until he successfully completed his pre-game warm-up session before officially activating him from the DL. He left to a standing ovation from the crowd of 37.328 at Nationals Park and was replaced by Blake Treinen, who got Billy Hamilton to ground out.

Strasburg started the day (10-0) in 14 starts with a 2.90 ERA, a 2.86 FIP, 24 walks (2.32 BB/9), 118 Ks (11.42 K/9) and a.218/.275/.346 line against in 93 innings.

Strasburg hasn't pitched since June 15, when he struck out eight and allowed six hits and one earned running in 7.0 innings.

Reds catcher Tucker Barnhart singled home the tiebreaking run off Solis in the 10th inning as Cincinnati snapped a five-game losing streak.

"It's really fitting that Tucker gets that hit in the tenth because we've been together since 2010 (when) I got drafted", Smith said. The Nationals shortstop went 4-for-5 with two homeruns, including a grand slam, and 6 RBIs.

Harper led off the fifth with his 17th homer.

Reds: 1B Joey Votto returned to the lineup after he was scratched Saturday with a sore right shoulder.

Danny Espinosa hit his 16th homer for the Nationals, who had won six straight after losing seven in a row. RHP Jonathan Papelbon (right intercostal strain) threw a scoreless inning Saturday night in his second rehab appearance for Double-A Harrisburg.

Nationals: RHP Max Scherzer (9-5) is to face the visiting Brewers in the opener of a three-game series.

In a bonus Nationals-themed "Fun With Arbitrary End Points" segment: Washington ranked 1st in runs scored (156), 2nd in SLG (.449), second in OPS (.788), third in home runs (39) second in doubles (57) and second in walks (104) in the NL. since June 1st before today.